This paper presents a methodology to rehabilitate and manage leakages of C-Town water distribution network. A hydraulic model with emitters was considered to represent leakages in pipes concentrated in the nodes. The methodology uses the Unit Head loss to rehabilitate the network, the Flow-Pressure concept to locate valves and GA for the pump optimization process. The result shows that all the requirements of the problem were accomplished with a small computational effort as expected by using hydraulic based processes and criteria. The mentioned concepts allowed the minimization of constructive and operational costs.